The Half Dosage PDT protocol for CSC was performed using half the normal dose of verteporfin (Visudyne, Novartis AG, Bülach, Switzerland) i.e., 3 mg/m2 infusion of verteporfin with a rationale that using lower dosage has less collateral damaging effects to the retina and choroid. Verteporfin was infused over 10 minutes followed by delivery of laser at 692 nm at 15 minutes from the commencement of infusion to target the area of choroidal dilation and hyperpermeability. Earlier laser application allowed less drug accumulation at the RPE layer and less drug less toxicity at the RPE. A total light energy of 50 J/cm2 over 83 seconds was delivered to the area of choroidal hyperperfusion as observed in ICGA instead of the angiographic leakage sites shown in FA. Only the area of choroidal vascular abnormality that was supposed to cause the serous detachment involving the macula was considered to be treated. To avoid overtreatment on the choroidal vasculature in causing choroidal ischemia, the laser spot size was set at a maximum of 4,500 µm. This restriction in laser spot size is adequate, from our previous report, to reverse the serous macular detachment by reducing the choroidal extravascular leakage and sub-RPE hydrostatic pressure at the macular area. In patients with bilateral CSC, only one eye was recruited for the study, and the eye with thicker central retinal thickness on OCT was chosen. After treatment, patients were given protective spectacles and instructed to avoid strong light for 3 days.